Concrete-filled steel tube sleeper type ballastless track and construction method thereof

Abstract

The invention discloses a concrete-filled steel tube sleeper type ballastless track, and the ballastless track comprises a base, a roadbed slab and a concrete-filled steel tube double-block sleeper, and is characterized in that a plurality of upward concave grooves are formed in the lower part of the roadbed slab, the base is provided with a plurality of upward convex bosses formed during self-pouring, and a vibration reduction layer surrounding the bosses is arranged between the base and the roadbed slab. Movement of the roadbed slab is limited by the roadbed slab groove and the base boss, the contact area of the roadbed slab and the base is increased, and the integrity of the track structure is improved. Meanwhile, the thickness of the base is reduced, and the height of the rail structure is reduced. A rubber anti-vibration pad is additionally arranged between the roadbed slab and the base, so the anti-vibration performance of the track structure is guaranteed, and the novel ballastless track structure can be applied to the field of urban rail transit with high environmental requirements. An elastic base plate is arranged between the roadbed slab groove and the base boss, so thevibration reduction performance can be enhanced, a buffering effect can be achieved, and adverse effects of stress concentration on a track structure are reduced.

Description

technical field [0001] The invention belongs to the field of ballastless track, and in particular relates to a steel tube concrete pillow type ballastless track and a construction method thereof. Background technique [0002] Among the existing cast-in-place ballastless track structures using prefabricated sleepers, there are mainly three types of ballastless track: short sleepers, long sleepers, and double-block ballastless tracks. [0003] Among them, although the cost of the short sleeper is low, the ability to maintain the geometric shape of the track is poor, and it cannot meet the higher technical requirements. [0004] The prestressed long sleeper can better ensure the geometric accuracy of the track structure, the integrity of the track row is better, and the track accuracy is easy to control in small radius curve sections. However, the sleeper passes through the longitudinal structural reinforcement of the ballast bed, and the construction is more complicated. The ...

AI Technical Summary

Problems solved by technology

However, the sleeper passes through the longitudinal structural reinforcement of the ballast bed, and the construction is more complicated. The bonding performance between the steel bar in the hole and the ballast bed is poor, the vibration under the sleeper is not sufficient, there are many contact surfaces between new and old concrete, and there are relatively many interface cracks, and the integrity of the ballast bed is not very good. it is good

[0005] Double-block sleepers are mainly connected by truss bars to two concrete sleeper blocks. The geometric shape of the track is strong and the integrity of the ballast bed is good, but the processing cost is high, and the truss bars are easy to rust. It is used in urban rail transit and the cost is relatively high.

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